print("hello world");    #这是一个开始仪式

months = [
 'January',
 'February',
 'March',
 'April',
 'May',
 'June',
 'July',
 'August',
 'September',
 'October',
 'November',
 'December'
]
# 一个列表，其中包含数1～31对应的结尾
endings = ['st', 'nd', 'rd'] + 17 * ['th'] + ['st', 'nd', 'rd'] + 7 * ['th'] + ['st']
year = input('Year: ')
month = input('Month (1-12): ')
day = input('Day (1-31): ')
month_number = int(month)
day_number = int(day)
# 别忘了将表示月和日的数减1，这样才能得到正确的索引
#[month_number-1]是因为索引是从0开始算
month_name = months[month_number-1]
#[day_number-1]是因为索引是从0开始算
ordinal = day + endings[day_number-1]
print(month_name + ' ' + ordinal + ', ' + year)
print(endings);